/* Copyright 2018 Canaan Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * \file cipher_internal.h
 *
 * \brief Cipher wrappers.
 *
 * \author Adriaan de Jong <dejong@fox-it.com>
 *
 *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 */
#ifndef MBEDTLS_CIPHER_WRAP_H
#define MBEDTLS_CIPHER_WRAP_H

#if !defined(MBEDTLS_CONFIG_FILE)
#include "config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#include "cipher.h"

#ifdef __cplusplus
extern "C"
{
#endif

    /**
 * Base cipher information. The non-mode specific functions and values.
 */
    struct mbedtls_cipher_base_t
    {
        /** Base Cipher type (e.g. MBEDTLS_CIPHER_ID_AES) */
        mbedtls_cipher_id_t cipher;

        /** Encrypt using ECB */
        int (*ecb_func)(void* ctx, mbedtls_operation_t mode,
            const unsigned char* input, unsigned char* output);

#if defined(MBEDTLS_CIPHER_MODE_CBC)
        /** Encrypt using CBC */
        int (*cbc_func)(void* ctx, mbedtls_operation_t mode, size_t length,
            unsigned char* iv, const unsigned char* input,
            unsigned char* output);
#endif

#if defined(MBEDTLS_CIPHER_MODE_CFB)
        /** Encrypt using CFB (Full length) */
        int (*cfb_func)(void* ctx, mbedtls_operation_t mode, size_t length, size_t* iv_off,
            unsigned char* iv, const unsigned char* input,
            unsigned char* output);
#endif

#if defined(MBEDTLS_CIPHER_MODE_CTR)
        /** Encrypt using CTR */
        int (*ctr_func)(void* ctx, size_t length, size_t* nc_off,
            unsigned char* nonce_counter, unsigned char* stream_block,
            const unsigned char* input, unsigned char* output);
#endif

#if defined(MBEDTLS_CIPHER_MODE_STREAM)
        /** Encrypt using STREAM */
        int (*stream_func)(void* ctx, size_t length,
            const unsigned char* input, unsigned char* output);
#endif

        /** Set key for encryption purposes */
        int (*setkey_enc_func)(void* ctx, const unsigned char* key,
            unsigned int key_bitlen);

        /** Set key for decryption purposes */
        int (*setkey_dec_func)(void* ctx, const unsigned char* key,
            unsigned int key_bitlen);

        /** Allocate a new context */
        void* (*ctx_alloc_func)(void);

        /** Free the given context */
        void (*ctx_free_func)(void* ctx);
    };

    typedef struct
    {
        mbedtls_cipher_type_t type;
        const mbedtls_cipher_info_t* info;
    } mbedtls_cipher_definition_t;

    extern const mbedtls_cipher_definition_t mbedtls_cipher_definitions[];

    extern int mbedtls_cipher_supported[];

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_CIPHER_WRAP_H */
